请求范围内的NInject, NHIbernate和session

我基本上使用了一个我在很多地方见过的例子，但我不相信它能正常工作。

所以，我有以下内容:

public class NHibernateHelper
{
    private readonly string _connectionString;
    private ISessionFactory _sessionFactory;
    public ISessionFactory SessionFactory
    {
        get { return _sessionFactory ?? (_sessionFactory = CreateSessionFactory()); }
    }
    public NHibernateHelper(string connectionString)
    {
        _connectionString = connectionString;
    }
    private ISessionFactory CreateSessionFactory()
    {
        return Fluently.Configure()
                .Database(FluentNHibernate.Cfg.Db.MySQLConfiguration.Standard
                    .Dialect("NHibernate.Spatial.Dialect.MySQLSpatialDialect,NHibernate.Spatial.MySQL")
                    .ConnectionString(_connectionString))
                    .Mappings(m => m.FluentMappings.AddFromAssemblyOf<EventListing>())
                    .ExposeConfiguration(x =>
                    {
                        x.SetProperty(NHibernate.Cfg.Environment.CurrentSessionContextClass, ConfigurationManager.AppSettings["current_session_context_class"]);
                    })
                .BuildSessionFactory();
    }
}

在我的Ninject启动中我有

private static void RegisterServices(IKernel kernel)
    {
        NHibernateHelper helper = new NHibernateHelper(WebConfigurationManager.ConnectionStrings["eventlisting"].ConnectionString);
        kernel.Bind<ISessionFactory>().ToConstant(helper.SessionFactory).InSingletonScope();
        kernel.Bind<ISession>().ToProvider(new SessionProvider()).InRequestScope();
        kernel.Bind(typeof(IReadOnlyRepository<>)).To(typeof(ReadOnlyRepository<>)).InRequestScope();
        kernel.Bind(typeof(IRepository<>)).To(typeof(Repository<>)).InRequestScope();
}

和我的会话提供程序类看起来像

public class SessionProvider : Provider<ISession>
{
    protected override ISession CreateInstance(IContext context)
    {
        ISession session = DependencyResolver.Current.GetService<ISessionFactory>().OpenSession();
        session.FlushMode = FlushMode.Auto;
        return session;
    }
}

令我困惑的是，尽管声明issession应该在请求范围内创建，但它似乎在每个请求中多次击中CreateInstance方法，并且看起来正在生成多个会话。

。如果我有一个带有以下构造函数的控制器:

public SomeController(
        IRepository<SomeClass> someClassRepository,
        IRepository<SomeOtherClass> someOtherClassRepository)
    {
        _someClassRepository = someClassRepository;
        _someOtherRepository = someOtherClassRepository;
    }

则CreateInstance方法被调用两次(我应该为存储库添加一个ISession参数的构造函数):

public Repository(ISession session)
    {
        this.Session = session;
    }

我认为有它作为InRequestScope将意味着它只被调用一次。这是我的误解还是我错过了一些代码的地方。

public class StringProvider : Provider<string>
{
    protected override string CreateInstance(IContext context)
    {
        return context.ToString();
    }
}

var kernel = new StandardKernel();
kernel.Bind<string>().ToProvider(new StringProvider()).InSingletonScope();
kernel.Get<string>();
kernel.Get<string>();
kernel.Get<string>();